Adjusting device for leather-skiving machines



(No Model.)

G. M. LUDLOW.

ADJUSTING DEVIGE EOE LEATHER SKIVING MACHINES. No. 256,844. Patented Apr. 25,1882-,

' UNITED STATES PATENT OFFICE.

GEORGE M. LUDLOW, OF CHICAGO, ILLINOIS.

ADJUSTING DEVICE FOR LEATHER-SKIVING MACHINES.

SPECIFICATION forming part of Letters Patent No. 256,844, dated April 25, 1882.

Application tiled January 27, 1882.

to/the letters of reference marked thereon,

which form a part of this specification.

This invention relates to an improvement in the skiving-machine shown in patents granted to O. Amazeen, February 26, 1878, and October 28,1879; and it consists in means, substantially as hereinafter set forth, for more perfectly and conveniently adjusting the position of the cutting-disk with reference to the feed-roller beneath it. In vsaid machine, as shown in the patents referred to, and as heretofore constructed, the vertical longitudinallymovable cutter-shaft is provided with two movable collars arranged between its two bearings, which4 collars are held upon the shaft by means of set-screws. In adjusting the cuttershaft vertically these collars are loosened and the shaft is raised or lowered, as the case may be, and the collars are then again secured upon the shaft, .so as to bear one against the lower surface of the upper bearing and the other against the upper surface of the lower bearing. In practice it is found to be very difficult to secure a nice adjustment of the cntter by these means, and the device herein set forth and claimed'is intended to remedy the difficulty named.

In the drawings, Figure l is an elevation of the cutter-shaft-and its immediate connections provided with my improvement, viewed from the end of the machine, the same being shown partly in section and with the feed-disk shaft removed. Fig. 2 is an elevation ofthe cuttershaft, its immediate support, and contiguous parts, viewed in front elevation. Fig. 3 is an end elevation of parts more immediately concerned in myimprovement. Fig. 4 shows the thumb-wheel of the screw notched on its edge, so as to actas a ratchet, in connection with a (No model.)

spring arranged to bear thereon to prevent the accidental retraction of the screw.

l A is the cutter-shaft, and A is the cuttingdisk, secured to the lower end of said shaft.

B is the feed-roll, and C is the feed-disk.

D is the frame in which the cutter-shaft is mounted, D and D2 being the upper and lower bearings of said shaft. It is understood that the frame D is movably secured upon the main frame ot' the machine, so that the inclination of the cutter to the feedroll may be varied atpleasure. As myinvention relates exclusively to the vertical adjustment of the cutter-shaft, only those parts concerned in this purpose will be further fully described. The bearings D and D2, as shown in said patents and as heretofore constructed in the machine, are both like the lower bearing herein shownthat is to say, they each consist of an arm, d, cast integral with the frame D, and aremovable cap, d2, held by a screw, d3. have substituted for the upper removable cap mentioned the cap d. In said cap d a squared recess, G', is provided, in which a metal block. G, is iitted to work freely, and a screw, lzl, having a thumb-wheel, I, is arranged to bear against the end of said block, as clearly shown in Fig.4l.

The shaft A is provided with a collar, E,

which may be of thc same piece with thc shaft or fastened thereto by means of a set-screw. Between this collar E and the bearing D2 a spiral spring, F, is arranged about the shaft A, operating to lift the shaft A and its cut ter A'.

p The purpose of the screw H and block G is to force the shaft and cutter downward against the action of said spring F, and to this end the block Gis arranged to bear at its inner free or protruding end upon the Lipper sur.- face of said collar E. This may be done by arranging the block and screw in a vertical or inclined direction; but, as the probably better construction, I have shown said block and screw in a horizontal position, radial to the shaft A, and the collar E and block G beveled on their meeting faces. An inward movement of the screw and block obviously depresses In my improvement I the collar and Guttershaft, and by retracting the screw the shaft rises by force of the spring F. By varying the bevel of the collar E any desired degree of delicacyT in the adjustment of the cutter may be obtained.

As av means of holding the knife at any required adjustment,thethumb-wheelIis notched upon its periphery, andthe springdetent J is provided to engage said notches.

If preferred, the thumb-wheel may have bev eled notches, so as to turn beneath the spring in runningin the screw, forming with the spring a ratchet and spring-pawl, as shown in Fig. 4, in which case the spring or pawl requires to be lifted only when the screw is retracted.

Obviously the Ypart G, intermediate the adjusting-screw H and the shaft-collar E, may be dispensed with when proper means, as described, are employed to prevent rotation of the screw; but unless said screw be arranged to bear squarely downward at its end upon the shaft or its collar it would be likely to wear, so as to impair its accuracy as a means of adjustment.

The invention as here shown may be readily applied to old machines merely by the substitution of the collar E and spring F for the two movable collars heretofore employed, and the further substitution of the cap cl', provided with the screw H and block G, for the plain cap previously used in the same position.

I claim as my invention- 1. In combination with the longitudinallymovable rotating cutter-shaft A in the machine described, a spring, F, arranged to raise the shaft, and a screw, H, suitably supported and arranged to bear downward thereon, sub stantially as and for the purposes set forth.

2. In a leather-skiving machine, the combination, with the shaft A, provided with a col lar, E, and `with the shaft-bearings D D2, of the spring F, interposed between the lower bearing and the collar, and an adjusting-screw fitted into a part of the upper bearing and arranged to bear downward upon said collar, substantially as described, and for the purposes set forth.

3. In combination with the longitudinallymovable cut-tershaft A, bearing a iixed collar, E, a part, d', recessed at G', and provided with the sliding block G, and adjusting-screw H,Yar ranged and operating substantially as described.

4. In combination with the vertically-Inovable shaft A, provided with the beveled Acolla-r E, and. with a spring, F, to raise the shaft, a part, d', provided with a beveled sliding block, G, and screw I, arrangtd and operating substantially as shown, and for the purposesset forth.

5. In the adjusting mechanism described for the cutter-shaft A, the screw H, provided with a notched thumb-wheel, I, combined with the spring J, arranged to engage the notches of said wheel, substantially as described.A

In testimony that I claim the foregoing as my invention I affix my signature in presence of two witnesses.

G. M. LUDLOW. ldlitnesses:

M. E. DAYTON, Jnssn COX, J r. 

